Bootstrap Responsive Design Help

So, when I resize my window, the images (which will be links to portfolio items eventually) are fine until a certain point, where they seem to smush over each other, and then they stack. is there a way to solve this issue? I’m still trying to figure it out myself, but anyhelp would be greatly appreciated.

Here is a link to my pen -

Thank you so much, friends!

Can you take a screen shot of the “smush over each other”?. Everything looks fine when I decrease the width of the browser down. Everything shrinks accordingly from what I see on my screen.

I ended up figuring it out. I used .thumbnail, which actually works better so I can caption the links. w3schools is a godsend.